Tv while traveling

Hulu yes Hulu plus live tv no ... you have to be on the home network. I tried it with my sister-in-law’s used there login and all was fine until I left their WiFi Roku and Fire don’t work. I can log in on the phone and get locals where I am but I have to use the mobile device. They won’t give an account to someone with just a mobile cellular account. Again that’s the “live tv “ cable channels and locals . That’s what I found but I’d love to find different.